<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .ul{
      width: 500px;
      height: 500px;
    }
    .li{
      width: 500px;
      height: 100px;
      background-color: green;
    }
  </style>
</head>

<body>
  <ul id=”test”>
    <li>这是第一条</li>
    <li>这是第二条</li>
    <li>这是第三条</li>
  </ul>
  <script src="./variables.js"></script>
</body>

</html>